When discussing the idea of a "planet ruled by zombies", the Fourth Doctor remembered the quote that "the living are just the dead on vacation." (TV: Destiny of the Daleks) Voicing her observations on the humanlifespan, which she found 'hilarious[ly]' short, Missy stated that human beings were born dying, remarking "You know from the minute you slop out, you're rotting, decaying." (TV: Death in Heaven)